Apparatus for twisting filaments, threads, bands, and the like



Sept. 19, 1939. E. A. MORTON APPARATUS FOR TWISTING FILAMENTS3'THREADS.BANDS, AND THE LIKE Filed May 6, 1939 /|NVE.NTOR ERlC ANDREW MORTON bykz'saifaflzay's Patented Sept. 19, 1939 UNITED STATES PATENT OFFICEAPPARATUS FOR TWISTING FILAMENTS, THREADS, BANDS, AND THE LIKE Britishcompany Application May 6, 1939, Serial no. 272,247

- In Great Britain May 16, 1938 2 Claims.

This invention relates to apparatus for twisting filaments, threads,bands and the like (hereinafter referred to as threads) and inparticular to that type of apparatus in which the thread is twisted inthe following manner: the thread is drawn off from a package such as abobbin, cake or cheese (hereinafter referred to as the delivery bobbin)passed through a rotating spindle, then guided in the reverse directionforming a balloon round the delivery bobbin and is wound on to asuitable collecting device. If the delivery bobbin is kept stationary,two turns of twist are imparted to the thread for each revolution of thespindle.

In order to maintain the delivery bobbin stationary while the spindlerotates, various methods have been proposed. For example it has beenproposed to use magnetic "means, such as an iron plate attached to oneend of the bobbin carrier and an electro magnet to attract this platecontinuously. It has also been proposed to use a weight which may -beattached to the delivery bobbin holder, or to the thread guide, or maybe loosely mounted or suspended in the latter, or loosely suspended inthe delivery bobbin holder. It has also been stated, however, that inpractice it is often found that the de livery bobbin holder or supporttends to oscillate upon the spindle and that this oscillation may beobviated by constructing the bobbin support with parts between whichrelative movement is adapted to take place, if and'when circumstancesarise under which the bobbin and its holder tend to oscillate.

The object of the present invention is to provide an improved apparatusfor twisting thread in the manner hereinbefore described, whereinmovement of the delivery bobbin is substantially prevented by a deviceof the suspended weight type.

According to the present invention the said improved apparatus comprisesa rotatable hollow spindle and mounted thereon a conical threadguide anda delivery bobbin support, which support is prevented from rotating withthe spindle by means of a weight, wherein the weight comprises a hollowelement partly filledwith a liquid.

The liquid is preferably of high specific gravity, such for example asmercury, particularly when the apparatus is to be used for twistingthreads of low denier when only a relatively small balloon is formed.The weight may be attached to the delivery bobbin support orincorporated therewith in any desired way. For example, it may beattached to, or form part of,

the conical thread guide, if the latter is loosely mounted on therotatable spindle and is attached to the/delivery bobbin support.Alternatively, it may be attached both to a sleeve or collar looselymounted on the said spindle and to the delivery bobbin support.

The conical thread guide may be loosely mounted on the rotating spindleor may be fixed thereto. If desired, a cylindrical or conical shieldmade for example of a transparent material, such as cellulose film, maybe placed between the delivery bobbin and the balloon of the thread.formed between the conical thread guide. on the rotating spindle and thecollecting device.

The accompanying diagrammatic drawing illustrates by way of example onearrangement of apparatus according to the present invention although theinvention is not restricted to the arrangement shown.

Figure 1 is a side elevation partly in section and Figure 2 is a sectionon the line 2-2 in Figure 1.

A spindle l is journalled on ball bearings i in a support 3 and can berotated by means of a belt drive around the pulley 4. 0n the spindle l aconical thread guide 5 is fixed. The spindle I is hollow and connectswith a radial passage 6 in the guide 5. A sleeve 1 is loosely mounted bymeans o1 ball bearings 8 on the spindle I inside the thread guide 5 andhanging from the sleeve 1 and rigidly connected thereto is a hollowmember 9 containing mercury l0. Fixed on top of the member 9 is a threadtensioning device II.

A bobbin holderconsisting of a disc l2, a hollow spindle l3 and atransparent shield I4 is rigidly connected with the end of the member 9.The thread I5 is led from the bobbin l6 through the hollow spindle l3,chafing of the thread on the end ,of the bobbin being minimised by meansof a polished aluminium disc I 1 fitting over the end of the bobbin,through the device II and the hollow spindle I, along the passage 6andthen in the reverse direction, over the guide 5, through a guide l8to a winding up device which is not shown. The spindle I is caused torotate by the belt drive on the pulley 4 and rotates inturn the threadguide 5 and the thread 'pa ssing through the passage 6, so that thethread describes a surface of rotation or a balloon between the guides 5and I8. Although the bobbin is in efiect supported on the rotatingspindle i oscillation of the bobbin is almost completely prevented bythe hanging liquid weight l0 and a the spindle by means of a weight,wherein the said weight comprises a. hollow element partly filled with aliquid.

2. Apparatus as claimed in claim 1, wherein the liquid contained in thehollow element is 5 mercury.

ERIC ANDREW MORTON.

